Configuring an STT20 or STT11 on Cerloop

Scenario: You want to configure Desigo CC for connecting to an STT11 or STT20 fire system on an Cerloop network via NK823x.

 

Reference: For background information, see the reference section.

 

Workflow diagram:

 

 

Prerequisites:

  • The following extension modules are installed and included in the active project:
    • CMSI STT20
    • Legacy systems via NK8000
  • System Manager is in Engineering mode.
  • System Browser is in Management View.

 

Steps:

1 – Preparing the STT Configuration

Configuring the NK823x Gateway

Before configuring the STT20 or STT11 Cerloop on Desigo CC, make sure to have configured the NK823x gateway on the BACnet network. See the NK823x integration instructions.

Planning the BACnet Network

Define the unique BACnet address (Device ID) for all STT20/STT11/SK11 units in the Cerloop.

Exporting the STT Configuration Files

You can import the STTxx data structures into the Desigo CC project using the configuration files exported by the STTxx tool. The configuration files are text files (.TXT) that contain the complete data structure of the panels.

NOTICE
Incorrect Interpretation of Messages

After first import, if the panel configuration is modified, you will need to import the configuration file again to align Desigo CC. Failing to import the latest configuration file may result in an incorrect interpretation of field messages. An Unidentified event is generated in all cases when a message is received with no corresponding data point.

 

2 – Create the Cerloop Network
  1. Select Project > Field Networks > [BACnet Network].
  1. Select the Object Configurator tab.
  1. Click New and select New Cerloop.
  1. In the New Object dialog box, enter a name and description.
  1. Click OK.
  • The Cerloop is added to System Browser.

 

3 – Add the MK7022 Serial Interface to the Cerloop
  1. Select Project > Field Networks > [BACnet Network] > [Cerloop].
  1. Select the Cerloop tab.
  1. Click New and select New MK7022.
  1. In the New Object dialog box, enter a name and description, and the Instance number: the BACnet Device Identifier.
  1. Click OK.
  • The MK7022 is added to System Browser and automatically selected.
  1. In the Configuration expander of the Cerloop tab, enter the following parameters:
    - Local Address: MK7022 address in the Cerloop. Valid values are 800 to 862 (default: 800).
    - Baud rate: 1200 or 2400 (ISO1745).
  1. Click Save .

 

4 – Synchronize the MK7022 Event Clock

To avoid inconsistencies in the events time stamp, you need to synchronize the MK7022 unit clock with Desigo CC.

  1. In System Browser, select Project > Field Networks > [BACnet network] > [Cerloop] > [MK7022 ] > [MK7022 Device].
  1. Select the BACnet tab.
  1. Open the Timing and Status Info expander.
  1. In the Time sync type drop-down list, select Local Time.
  1. In the UTC offset text field, type the UTC offset in minutes, with opposite sign (for example, if the UTC offset is +1 hour, type -60).
  1. Click Save .

 

5 – Connect the MK7022 Serial Interface to the NK823x
  1. In System Browser, select the NK823x COM port where the MK7022 serial interface is connected, which is one of the following:
    - Project > Field Networks > [BACnet Network] > [NK823x] > [COM1]
    - Project > Field Networks > [BACnet Network] > [NK823x] > [COM2]
    - Project > Field Networks > [BACnet Network] > [NK823x] > [Expansion Board] > [COM3]
    - Project > Field Networks > [BACnet Network] > [NK823x] > [Expansion Board] > [COM4]
  1. Select the NK8000 tab.
  1. In the Configuration expander, from the Control Unit drop-down list, select the MK7022 you configured above.
  1. Click Save .

 

6 – Configure an STT11 Fire System in the Cerloop

After configuring the Cerloop and MK7022 as above, you can add one or more STT11 fire systems under the Cerloop network. Repeat the following steps 6a, 6b and 6c below for each STT11 fire system.

6a – Create the STT11 under Cerloop

  1. Select Project > Field Networks > [BACnet Network] > [Cerloop].
  1. In the Cerloop tab, click New and select New STT11 System.
  1. In the New Object dialog box, enter a name and description.
  1. Click OK.
  • The new STT11 is added to System Browser.

 

6b – Add the SK11 Gateway under the STT11

  1. Select Project > Field Networks > [BACnet Network] > [Cerloop] > [STT11 system]
  1. In the Cerloop tab, click New and select New SK11.
  1. In the New Object dialog box, enter a name and description, and the Instance number: the BACnet Device Identifier.
  1. Click OK.
  • The SK11 is added to System Browser, and automatically selected.
  1. In the Configuration expander, enter the Local address of the SK11 in the Cerloop, as configured in the fire system.
    NOTE: Valid values are: 110, 120, 130, 140, 210, 220, 230, 240, 800 to 862 (default: 110).
  1. Click Save .

 

6c – Add STT11 panels under the STT11 Fire System

Repeat this procedure for all the STT11 panels you want to add.

  1. Select Project > Field Networks > [BACnet Network] > [Cerloop] > [STT11 system].
  1. In the Cerloop tab, click New and select New STT11.
  1. In the New Object dialog box, enter a name and description, and the Instance number: the BACnet Device Identifier.
  1. Click OK.
  • The newly created STT11 is automatically selected in System Browser.
  1. In the Configuration expander, enter the Local address of the STT11 in the Cerloop, as configured in the fire system.
    NOTE: Valid values are: 111 to 118, 121 to 128, 131 to 138, 141 to 148, 211 to 218, 221 to 228, 231 to 238 , 241 to 248 (default: 111).
  1. Click Save .

 

7 – Configure STT20 Fire Panels in the Cerloop

Repeat this procedure for all the STT20 panels you want to add.

  1. Select Project > Field Networks > [BACnet Network] > [Cerloop].
  1. In the Cerloop tab, click New and select New STT20.
  1. In the New Object dialog box, enter a name and description.
  1. Click OK.
  • The newly created STT20 is automatically selected in System Browser.
  1. In the Configuration expander, enter the following parameters:
  • Instance number: the BACnet Device Identifier.
  • Local address: STT20 address in the Cerloop. Valid values are: 111 to 118, 121 to 128, 131 to 138, 141 to 148, 211 to 218, 221 to 228, 231 to 238 , 241 to 248 (default: 111).
    NOTE: The Local Address must match the value set in the configuration file of the fire system.
  1. Click Save .

 

8 – Import the STT Configuration Files
  • Valid configuration files for each STT11 or STT20 unit are available locally or over the network.
  • The destination fire network is configured, and its associated BACnet driver is started.
  • To speed configuration, make sure the Desigo CC Transaction Mode is set to Simple or the Automatic Switch of Transaction Mode is set to True.
    The automatic switch setting is recommended. Without it, to re-enable the logs, you need to set the Transaction Mode to Logging at the end of the configuration procedure.
  1. In System Browser, select the first STT unit in one of the following locations:
    - Project > Field Networks > [BACnet Network] > [Cerloop] > [STT20]
    - Project > Field Networks > [BACnet Network] > [Cerloop] > [STT11 system] > [STT11 panel]
  1. In the Import tab, click Browse and select the configuration file for this panel.
  • The configuration file is checked for errors and the Analysis Log button becomes available to show the check log.
  • If the configuration file is valid, the configuration file to import displays in the Source Items list.
  1. ((Optional) In the Hierarchies Mapping expander, drag-and-drop an additional hierarchical structure (physical and/or logical according to the database contents) from the System Browser position where you want to import.
    ATTENTION: Carefully select and link the node to the correct position as you cannot change it later. The only way to modify the additional import setting is to delete the destination node and create it again.
  1. In the Source Items list, click to select all files for import, or click to select an individual file.
  • The configuration file is moved to the Items to Import list.
  1. Click Import.
  • The configuration data is available in System Browser.
  • The Import Log button becomes available to show the import log.
  • A backup copy of the imported file is saved in the project folder, in the shared\Imported_Config_Files\[subsystem name]\ subfolder.
    The file is compressed into a ZIP file named after the current date and time. For example: 2021-10-22_13-52-07.zip.
    NOTE: See also the configuration procedure of the backup folder, which allows you to control the disk space occupancy, and also to disable the backup copy altogether.
  1. Repeat the steps above for each STT11 or STT20 unit.
NOTICE
Objects limit in a project

Based on the hardware category of the installation, there is a limit to the number of objects a project can have.
- The system prevents you from performing imports that would exceed this limit.
- The system warns you if an import would approach this limit (90% or more of allowed objects). You can then choose whether to proceed.

NOTICE
Incorrect Interpretation of Messages

After first import, if the panel configuration is modified, you will need to import the configuration file again to align Desigo CC. Failing to import the latest configuration file may result in an incorrect interpretation of field messages. An Unidentified event is generated in all cases when a message is received with no corresponding data point.

 

9 – Synchronize the STT Events Clock

To avoid inconsistencies in the event time stamps, you must synchronize the Desigo CC clock with the NK823x Ethernet Port, and with all units configured in the fire system.

  1. Select Project > Field Networks > [BACnet network] > [Cerloop] > [STT20] > [STT20 Device] and perform the steps in Synchronize the Clock, below.
  1. Select Project > Field Networks > [BACnet network] > [Cerloop] > [STT11 System] > [SK11] > [SK11 Device] and perform the steps in Synchronize the Clock, below.
  1. Select Project > Field Networks > [BACnet network] > [Cerloop] > [STT11 System] > [STT11] > [STT11 Device] and perform the steps in Synchronize the Clock, below.

Synchronize the Clock

Perform these steps for each device node selected above.

  1. Click the BACnet tab.
  1. Open the Timing and Status Info expander.
  1. In the Time sync type drop-down list, select Local Time.
  1. In the UTC offset text field, type the UTC offset in minutes, with opposite sign (for example, if the UTC offset is +1 hour, type -60).
  1. Click Save .

 

10 – Download the STT Configuration to the NK823x
  1. In System Browser, select Project > Field Networks > [BACnet network] > [NK823x].
  1. Select the NK8000 tab.
  1. (Optional) Open the Configuration expander, and configure the file transfer mode to apply to subsequent downloads (the current download applies the mode that is currently set).
    This option is set to Use secure download by default (encrypted data transmission on TCP port 20500). If you have a local and safe connection to NK823x, you may want to deselect the check box and apply a faster FTP passive mode. Proceed as follows:
    a. Deselect the check box. Note the warning message about potential vulnerabilities.
    b. Click Save .
  1. Click Download configuration.
  • A confirmation box displays.
  1. Click OK.
  • The download starts. After a few minutes, the new configuration is active.
    NOTE: Depending on the type of modification, the NK823x may need to restart to complete the procedure.
NOTICE
Security Vulnerabilities

The use of the FTP mode on public or unsecure networks creates serious security vulnerabilities. For more information, refer to the Security section.